Why doesn't core get updated to 8.5?

Question

I am trying to update via Composer following what reported in Update core via Composer, but when I do composer update drupal/core --with-dependencies, I get the following output.

Loading composer repositories with package information
Updating dependencies (including require-dev)
Nothing to install or update
Generating autoload files

I checked /admin/report/updates, and I can see that Drupal 8.5 is available. The content of composer.json is the following.

    "repositories": [
    {
        "type": "composer",
        "url": "https://packages.drupal.org/8"
    }
]

Why isn't Composer updating core?

Answer 1

If composer update drupal/core --with-dependencies doesn't work, verify the composer.json file contains these lines and remove them. (XX equals anything.)

"replace": {
    "drupal/core": "~8.XX"
}

In any case, run composer require drupal/core:~8.5.1, even if the composer.json file did not contain those lines.

If that fails, try my last ditch method.

• Remove the core and vendor folders

  sudo rm -rf core vendor
  

• Clear the Composer cache

  composer clearcache
  

• Run composer require drupal/core:~8.5.1

Don't forget to make a backup first, if you haven't already.